Why was Samuel Taylor Coleridges poem kubla khan unfinished?

Samuel Taylor Coleridge's poem "Kubla Khan" remains unfinished due to the interruption he experienced while writing it. He claimed that the inspiration came to him during a dream, and when he was in the process of composing the poem, he was disrupted by an unexpected visitor, which caused him to lose the thread of his creative flow. As a result, he was unable to fully develop the poem as he envisioned it, leaving it in its incomplete state.